Airtel is back with new data offer exclusively for Samsung Galaxy J series. Under this offer, eligible owners will only pay about Rs 17 per GB.Customers will pay the standard price for 1GB 4G data and get 14GB added to their account for free. The only condition is that the additional data can be used only during the night, which is between 12 am and 6 am. According to the terms and conditions, the 15GB offer is applicable for 3 recharges or 3 months, whichever is earlier.